Meaning of the word "a lifetime" in English

What does "a lifetime" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a lifetime

US /ˈlaɪfˌtaɪm/
UK /ˈlaɪfˌtaɪm/

Noun

the duration of a person's life

Example:
He achieved more in a lifetime than most people do.
It was the experience of a lifetime.